6465859868 has 48 divisors (see below), whose sum is σ = 12434337216. Its totient is φ = 2923514880.

The previous prime is 6465859867. The next prime is 6465859891. The reversal of 6465859868 is 8689585646.

It is a super-2 number, since 2×6465859868² = 83614687665225954848, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6465859867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2426705 + ... + 2429367.

It is an arithmetic number, because the mean of its divisors is an integer number (259048692).

Almost surely, 2^6465859868 is an apocalyptic number.

It is an amenable number.

6465859868 is a deficient number, since it is larger than the sum of its proper divisors (5968477348).

6465859868 is a wasteful number, since it uses less digits than its factorization.

6465859868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3614 (or 3612 counting only the distinct ones).

The product of its digits is 99532800, while the sum is 65.

The square root of 6465859868 is about 80410.5706235194. The cubic root of 6465859868 is about 1862.9824457037.

The spelling of 6465859868 in words is "six billion, four hundred sixty-five million, eight hundred fifty-nine thousand, eight hundred sixty-eight".